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Streaming Price of Bitcoin from FTX> https://docs.ftx.com/#websocket-api
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| import WebSocket from 'ws'; | |
| const ws = new WebSocket('wss://ftx.com/ws/'); | |
| let ping; | |
| function open() { | |
| ws.on('open', function open() { | |
| ws.send(JSON.stringify({ | |
| op: 'subscribe', | |
| channel: 'ticker', | |
| market: 'BTC-PERP' | |
| })) | |
| setInterval(() => { | |
| if (ping === "yes") | |
| open(); | |
| ping = "yes"; | |
| ws.send(JSON.stringify({ op: 'ping' })) | |
| }, 15000); | |
| }); | |
| } | |
| open(); | |
| ws.on('message', async (data) => { | |
| let payload | |
| try { | |
| payload = JSON.parse(data); | |
| } catch(e) { | |
| console.error('ftx send bad json', data); | |
| } | |
| if (payload) | |
| { | |
| if (payload.channel === "ticker" && payload.type === "update") | |
| priceData = payload.data; | |
| else if (payload.type === "pong") | |
| ping = "done"; | |
| } | |
| }); | |
| ws.on('error', (error) => { | |
| console.error(error); | |
| }); | |
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